Round each number to the nearest thousand.   which is the best estimate for the sum of 472,378 + 178,261?

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

What is the value of x when x + 7 = 21?